Lol, here's the definition:
The placebo effect is the measurable, observable, or felt improvement in health or behavior not attributable to a medication or invasive treatment that has been administered.
A placebo (Latin for "I shall please") is a pharmacologically inert substance (such as saline solution or a starch tablet) that produces an effect similar to what would be expected of a pharmacologically active substance (such as an antibiotic).
By extension, "fake" surgery and "fake" therapies are considered placebos.